Henry p



(No Model.)

H. F. BEOHMAN.

PRINTING PRESS.

WITNESSES .zlllorn ey;

NITED STATES -ATENT Prion.

HENRY F. BEOHMAN, OF BATTLE CREEK, MICHIGAN, ASSIGNOR TO THE DUPLEXPRINTING PRESS COMPANY, OF SAME PLACE.

PRINTING-PRESS,

SPECIFICATION forming part of Letters Patent N 0. 592,684, dated October26, 1897.

,1 Application filed April 9,1896. Renewed Apri122, 1897. Serial No.688,375. (No model-l To all whom it flea/y concern:

Be it known that I, HENRY F. BECHMAN,

of Battle Creek, in the county of Calhoun and State of Michigan, haveinvented certain new and useful Improvements in Printing- Pre'sses; andI do hereby declarethat the following is a full, clear, and exactdescription thereof, reference being had to the ac companying drawing,and t0 the letters of reference marked thereon, which forms part of thisspecification.

This invention is an improvement in printing-presses employing movablebeds and'reciprocating cylinders.

The object of this invention is to shorten the travel or stroke of thecylinder in that class of flat-bed printing-presses in whichreciprocating cylinders are employed, andthus reduce the necessarylength of the machine and increase its speed. I believe thenonsynchronous reciprocations of bed and cylinder secured by myinvention and the results thereby obtained are entirely novel.

This invention is particularly useful as applied to fiat-bed Web-pressessuch as is described in the patent to J. L. Cox, No. 478,503, dated July5, 1892, inasmuch as the serious complications which arise insynchronously reciprocating the beds and cylinders in such presses areavoided by my in-. vention. I do not wish 'to be understood, however, aslimiting the application of' my invention to such machines.

My movable bed makes two full reciprocations for each reciprocation .ofthe cylinder, this relative movement being wholly novel and producingnovel and useful results.

In the accompanying drawing I have illustrated a detail verticallongitudinal section through a portion of a printing-press sufficient toimpart, in. connection with the following description, a clearunderstanding of my invention.

I do not, however, consider my invention limited to the particular formof press indicated in drawing, as it is applicable to web or sheetpresses, either single or perfecting.

Referring to said drawing, A is a longitudinally-movable type bedsuitably mounted in any of the well-known ways on the side frames S.This bed may be reciprocated by a connecting-rod B, having a yoke b,surrounding the main shaft M, and afriction-roller b,

engaging a cam-groove c in a cam-disk O, aflixed to shaft M, as shown.

D is the impression-cylinder, which, with inking-rollers d d, issuitably journaled in a reciprocating carriage E of any suitableconstruction, mounted in any wellknown mannor on the main frames S andreciprocated by means of a pitman F, attached to wristpin j on the maindriving or crank wheels G.

The dotted lines 2 2 show the positions of the ends of the bed when thecam has shifted it to position ready for contact of impressioncylinderwith the type-form. I

The operation is as follows: The parts being in the position shown infull lines let the main driving-wheel G begin a revolution in thedirection indicated by the arrow. The bed, driven by the cam, will bemoved toward the impression-cylinder, which will simultaneously begin tomove toward the bed. The cam is so formed as to cause the bed to advancefrom line 1 until its ends coincide,

' movements are so timed by properly shaping the cams as to cause thereciprocations of the bed to occur in the intervals between successiveimpressions. Uniform rate of motion of bed and periphery'of cylinder maybe secured by racks and gears on bed and ends of cylinder in the usualmanner.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent thereon, is V 1. In a printing-press thecombination of a locomotive-cylinder and a movable typebed withmechanism whereby the bed is twice reciprocated during eachreciprocation I of the cylinder in a plane parallel with the 4. In aprinting-press the combination of a loeomotivecylinder and a movabletypebed; with mechanism whereby the bed is twice reciprocated duringeach reciprocation of the cylinder and while the cylinder is not incontact with the type-forms, substantially as described.

In testimony that I claim the foregoing as my own I ailix my signaturein presence of. two witnesses.

HENRY F. BECIIMAN. Witnesses:

I. L. STONE, FRANK W. DUNNING.

